James speucb



(ModeL) J. SPRUCE.

SPRING HINGE.

Patented May 8, 1883.

I remain in the position to which they are ad- B designates the pintlethereof. These parts NITED 1 STATES MANUFACTURING SPRING- HINGE.

, "SPECIFICATION formingpart of Letters Patent No. 277,370,

Application filed May 1, 1882. (ModeL) To all whom it may concern:

Be it'k-nown that I, JAMES SPRUCE, of Waterbury,in the county of NewHaven and State of Connecticut, have invented a certain new and usefulImprovement in Spring-Hinges, of which the following is a specification.

My improvement relates to spring-hinges of the kind in which a spiralspring is fitted to the pintle, so that as the leaves of the hinge aremoved laterally to each other the spring wind's or unwinds.

The object of myiinprovement is to obviate or reduce the wearing of the'spring in rubbing against the pintle of the hinge.

To this end my improvement consists in the combination, in a hingehaving aspiral spring applied to its pintle, of a wire or wires wound soas to be of the same pitch as the spring introduced between the pintleand one or both end portions of the spring, and titted to the spacebetween the coils of the spring. These wires form sleeves which willremain in place when once fitted to the spring, and as much morefriction will be generated between them and the spring than between themand the pintle, they will always move with the spring.

1n the accompanying drawings, Figure 1 is a face view of a hingeembodyingmy improvement with the leaves extended. Fig. 2 is an edge viewof the same, and Fig. 3 is a sectional edge vie-w ot' the same.

Similar letters of reference designate corresponding parts in all thefigures.

A A designate the leaves of the hinge, and

are fitted manner.

O designates a spiral spring fitted to the pintle between the bearers ofthe leaf A, and having its ends extended, one over each of the leaves.

D designates -spirallywound wires introduced between the end coils ofthe spring (3 and the adjacent portions of the pintle B. They are woundso as to be of the same pitch as the spring, and fit in the spacebetween the coils of the spring. Then they will and secured together inthe usual justed, and as the exterior spring contracts slightly indiameter when the hinge is oper- COMPANY, OF SAME .IZLAGE.

dated m 8, 1 883.

ated, it will bind on the spirally-wound wires and will cause them tomove with the spring,

and not remain stationary with the pintle. Thus the wear of the springentailed by its.

rubbing against the These wires may be pintle will be obviated.

wound separately from the springs and inserted afterward.

Of course I may,

if desirable, use'such a sleeve in connection with one end of the springonly.

1 am aware that a spring-hinge has been made in which the spring-poweris divided be- 'tween two springs, one within inner spring had not theother. The

its coils fitted to the coils of the outer spring, and wasnot adapted toturn loosely on the pintle. was subjected to abrasion on the pintle,

The inner spring and as the spring force of the hinge was dependent uponit, the hinge became useless for the purpose for which it was designedon the breakage of this spring. I have before pat ented a sprin g-hingehaving a spirally-grooved sleeve introduced spring and receiving springin its groove. expensive than the between the, pintle and the endportion of the The wire coil is far less spirally-grooved sleeve,

owing not only to the cost of material, but also to the expense of thelabor involved in its production. spring, an extensive and As the wirecoil fits the coils ot' the it will, by reason of its resilience, haveeffective contact with the spring. When the spring is compressed in theoperation of the hinge it will grip the wire coil tightly and insure itsturning with the spring, thus preventing the coil from abrading thespring.

What I claim as my invention, and desire to secure by Letters Patent,is-

The combination, in a hinge having a spiral spring around the pintle, ofa wire or wires wound so as to be of spring, introduced between of thespring and fitted to the coils of the spring,

or both end portions the space between whereby abrasion of substantiallyas specified.

Witnesses:

M. L. SPERRY, G. O. THOMAS.

the same pitch as the the pintle and one the spring is obviated,

JAMES SPRUCE.

